Probably not a smart move. Public figure. Almost impossible to win a libel claim.

Not to mention that one of her own reasons for resigning was the excess of frivolous lawsuits brought against her. Doing what you just got done roundly criticizing your opposition for doing will be labeled “hypocrisy” in short order.

Worse: now that she’s made the threat, she’ll add the “all talk and no action” to the “quitter” label already being pinned on her if she doesn’t follow through with it.